Read the last sentence of my last post and you have your answer.
Your examples have larger batteries, so it's hardly surprising. In the extreme case size (and weight) also matters of course.
So what's your point? If a phone last just as long and charges faster and has a bigger display with a higher resolution I don't see the problem. Of course with a larger phone comes a larger battery. Why waste the space? You wouldn't put a 10 gallon gas tank in a full size pickup.
I fully expect Apple to have a larger battery in the iPhone 6. You make it sound as if Apple will somehow use the same battery capacity between iPhone 5s and iPhone 6. I'd rather have a fat phone with excellent battery life vs. a skinny one with the same. With a S5 that's possible with a removable battery and battery door. And it's the same reason why I love those iPhone battery cases.